Ripple Measurements

The following table includes the ripple levels we measured on the 1600 T2's rails. The limits, according to the ATX specification, are 120mV (+12V) and 50mV (5V, 3.3V, and 5VSB).

Test

12V

5V

3.3V

5VSB

Pass/Fail

10% Load

2.0mV

3.9mV

4.0mV

5.4mV

Pass

20% Load

3.0mV

5.4mV

5.2mV

6.9mV

Pass

30% Load

4.2mV

8.4mV

7.7mV

8.2mV

Pass

40% Load

5.0mV

9.0mV

10.1mV

9.6mV

Pass

50% Load

5.4mV

10.6mV

8.4mV

10.4mV

Pass

60% Load

5.6mV

11.5mV

9.2mV

11.4mV

Pass

70% Load

6.2mV

13.7mV

10.9mV

13.2mV

Pass

80% Load

6.1mV

15.7mV

12.4mV

15.4mV

Pass

90% Load

6.8mV

17.5mV

13.7mV

20.5mV

Pass

100% Load

7.6mV

19.8mV

17.6mV

25.9mV

Pass

110% Load

8.3mV

20.5mV

29.4mV

24.4mV

Pass

Cross-Load 1

1.9mV

4.5mV

6.6mV

9.5mV

Pass

Cross-Load 2

7.8mV

19.2mV

14.4mV

24.5mV

Pass

Result 30 -22_Ripple_12V_Comparison

Result 31 -23_Ripple_5V_Comparison

Result 32 -24_Ripple_33V_Comparison

Result 33 -25_Ripple_5VSB_Comparison

Result 30 -22_Ripple_12V_Comparison

Result 31 -23_Ripple_5V_Comparison

Result 32 -24_Ripple_33V_Comparison

Result 33 -25_Ripple_5VSB_Comparison

EVGA's ripple suppression is very good. It's only with 110% load that we notice the 3.3V rail misbehaving, reaching close to 30mV. That's operating the PSU beyond its specifications, though, so we can't really complain.

Ripple Oscilloscope Screenshots

The following oscilloscope screenshots illustrate the AC ripple and noise registered on the main rails (+12V, 5V, 3.3V and 5VSB). The bigger the fluctuations on the screen, the bigger the ripple/noise. We set 0.01 V/Div (each vertical division/box equals 0.01V) as the standard for all measurements.